Tasmania's fire service predicts this summer's fire-fighting bill will cost the State Government more than $5 million.

Deputy Chief Officer Gavin Freeman says $5 million has already been spent and a "significant amount" of invoices, including those for machinery and aircraft hire, still need to be paid.

The State Government reimburses the fire service for its operational costs at the end of each fire season.

The Premier, Lara Giddings, says it will not necessarily impact on her budget's bottom line.

"The state fire levy, for instance, should help cover a fair part of that cost, if not the whole cost," she said.

Mr Freeman says it has been money well spent.

"While we're saying the season has been quite expensive if you look at it the other side, and what has been saved, and the potential disasters that have been averted I think it all comes into balance then," he said.

Last year's fire-fighting bill was $1.5 million.

The Government is already spending at least $3 million to clean up 300 properties impacted by January's devastating south-east bushfire.